Highlight raise as exception

Author: Abrosimov-a-a

syntax/python.vim

@@ -83,7 +83,8 @@ if s:Enabled('g:python_highlight_class_vars')
 endif
 syn keyword pythonRepeat        for while
 syn keyword pythonConditional   if elif else
-syn keyword pythonException     try except finally
+syn keyword pythonException     try except finally raise
+syn keyword pythonException     raise nextgroup=pythonExClass skipwhite
 " The standard pyrex.vim unconditionally removes the pythonInclude group, so
 " we provide a dummy group here to avoid crashing pyrex.vim.
 syn keyword pythonInclude       import